Electrical safety system



Nov. 16,1937. l. E. BUTLER l r v ELECTRICAL SAFETY SYSTEM Filed Nov. 30, 1954 5 Sheets-Sheet 1 Nov. 16, 1937. l. E BULER j l 2,099,195 l ELECTRICAL SAFETY SYSTEM Filed Nov. so, 1954 l 5 sheets-sheet 2 \N\\\\\\\\\\\\\\\ WN Il' .M535

Nov. 16, 1937. BUTLER 'l 2,099,195 i ELECTRICAL SAFETY SYSTEM I I' Filed Nov. so,v 1954 s sheets-sheet' s Patented Nov, 16, 1937 `-`UIKUTED STATES PATENT oEElcE ELECTRICAL SAFETY SYSTEM Irvin E. ButlelyBaltimor C. Fowler,

half to John e, Md., assigner of one- Baltimore, Md.

Application November so, 1934, serial No. 755,303 2 claims.A (cl. 711-265) 'I'his invention relates to certain new and useful improvements in electric safety systems A further object of the invention isthe pro- :':vision ofv a safety system electrically operated and 1s more particularly adapted for structures such closed and locked before vany Second (1001103111 bk Opened.

hereinafter more fully described, illustrated in the accompanying drawings, and claimed.

In the drawings, Y

Figure lis a persective view of my improved Velectrical safety system as constructed in acure 1;

cordance with my invention;

Figure'2 isa tion;V

Figure 4 is a view similar to Figure 3, the parts Y device.

' opening. The

sectionalrrplan View, through Fig- V View taken through a Y portion of-adoorand door jamb, depicting oneV being illustrated in unlocked position; k

Figure 5 is a transverse sectional View, on the line 555 ofk Figure 3;

Figure 5 is a plan sectional view, on the line 6 6*v of Figure 3; and,

Figure 7 is a diagrammatical showing of the electrical circuit used in this electrical safety Referring to the drawings, the numeral l indicates a safety deposit structure, in the present instance illustrated as'an armored truck, it being understood, however, that any other structure embodying a safety deposit construction may be used so long as the same embodies a plurality of compartments, each provided with an entrance entrance opening of each compartment 2 is formed by partitions 3, having doors 4 for entrance `to the various rooms or compartments. Y I To these doors of the compartments I provide an 'electrical locking system whereby control of [all of the locks is located at a the doorsv and unless properly operated prevents Y Further, after the master control has been set to permit the unlocking of the doors one door only may be In other words after one Y before any other door may be opened, the first door must be Closed and locked, this being clearly illustrated in the several figures ofthe drawings. Y

It is to be further understood that the remote or master control can be placed in various remote positions from the safety deposit constructions as a whole, this being done for safety sake, so that the device as a whole can either be put in operation or it can be so setrin. order that all of the doors may be closed and locked.

As shown in the drawings, the master or reof the vehicle and embodies a switch 6, might be under the control of a lock l, if so desired.

Since the locking devices of all the doors are point distant from 'i A spring vIl normally urges the bolt towards Y locking position at all times'and a dog IZengages the inner end of verse notch I3 formed therein, the purpose of which will be hereinafter more fully described. A tumbler lock I4 under the control o1' a key the bolt to hold the same in I5 is mounted for operation in the lock case. A disc I6 secured to the lock barrel I4 carries a pin I1 thereon, which, upon rotation of the lock barrel, moves into the notch I3 to withdraw the bolt from its keeper 9, as will be clearly apparent from inspection of Figure 4 of the drawings. The periphery of the disc I6 carries a band of insulation I8 attached to which is a segmental contact plate I9, and this plate I9 is offset, as shown in Figure 5 of the drawings, providing a surface 2I'I for a brush 2| to wipe over, and another surface 22 for a second brush 23 to engage.

Secured within the casing 8 is a solenoid 24 and the core of this solenoid constitutes the dog I2. A rod 25 carries a fixed collar 26, between which and the solenoid 2'I there is interposed a spring 28 for lifting the dog I2 to operative, active position.

A projection 29 secured to the dog I2 is adapted to move in a path of a pair of spring contact arms 3|) to make contact in a circuit and for the purpose to be hereinafter more fully described when the dog is in locking position, as shown in Figure 3.

Each door carries in its lower edge a spring actuated contact plunger 3|, and a contact plate 32 is secured in a circular groove 33 formed in the floor of the compartment and is positioned immediately under the door when in closed position, the plate being less extensive than the thickness of the door so that when the door is opened contact between the pin 3| and the plate 32 will be broken before the door has been opened to any appreciable degree. The circular plate 34 is secured to the door, as indicated in Figure 3, and rides in the groove 33 at all times, so as to prevent tampering With the contacts 3| and 32, either when the door is opened or closed.

Reference will now be had to Figure rI, in which the electrical circuit and its source will be described.

A source of electrical energy, which may be taken from the car battery or any other electrical output unit, is indicated at 35, one side of which is connected to one terminal of the switch E, a conductor 35 leads from the other side of the switch to the upper spring arm 3|! of the first door. Y

For convenience, as shown in the diagram, connections are led from theY fixed parts of the structure to the movable parts, or doors, through the hinged members and it is to be understood that other means might be used to accomplish the same results.

The other or lower spring arm 3|] is connected to the upper arm of the next pair of spring arms through a connection 3'I, a branch 38 leads to the coil 24 and another lead 33 from the other e'nd of the coil connects the other end of the coil with the brush 23.

A connector 4! leads from the brush 2| to the contact pin 3|, and a conductor 4| leads from the plate 32 to the conductor 40 on the next door, thus leading to the pin 3| on that door.

The same arrangement of connections just described can be carried of doors and compartments to the last one of the group where the circuit will be completed by means of a connector 42 leading from the plate 32 at the last door, back to the source of energy 35.

In operation, let it be assumed that the parts are in the position shown in the diagram Figure 7 and in Figure 3. It is evident that operation of the bolt II] is impossible because of the dog I2. When it is desired to permit operation of the locks, an operator closes the switch 6,- which may be located at any given point. It is noted at this point that the circuit is still open by reason of the break in the circuit between the brush 2| and the contact 20. Rotation of the lock barrel I4 and the disc I6 carried thereby, by insertion of a key at any one of the doors will cause the contact 2t to move into engagement with the brush 2| and establish a circuit by way of the conductor 36, arms 30, branches 38 and 39, brush 23, contact I9, brush 2|, conductor 40, pin 3|, plate 32, conductors 4| and 42, back to the battery 35 and switch 6, thus energizing the solenoid 24 and disengaging the dog I2 from Ythe bolt III. It will be seen in Figure 3, that the pin I1 is so located with respect to the slot I3 scribed rotation of the disc I6 may be made to close the circuit before the pin engages the slot in the bolt.

As the dog I2 moves downwardly towards its lowermost position the circuit will be broken at the spring arms 30, as shown in Figure 4, but not before a cam shaped surface 43 on the bolt I0 has arrived over the end of the dog, thus further depressing the dog and positively preventing areclosing of the circuit at this point until the bolt is again permitted to return to its'locked position. Y

With the parts in the position just described, and as shown in Figure 4, the door may be swung open. As this occurs the circuit is again broken by action of the pin 3| leaving the contact plate 32, and any permitting the bolt I0 to move to its forward position will thereby be frustrated.`

It will be evident that with any one of the doors in unlocked or opened position, no other door in the entire system can be opened', and a positive measure of safety is assured due to the fact that the doors must be opened and closed selectivelybefore any other door can be operated, or the system is such that the master switch may be 'opened and the entire system is inoperative.

Having thus described my invention, what I claim as new is:

1. An electrical safety system for a structure, including a series of compartments, doors for each of said compartments, locks for said doors, contacts and conta-ct plates carried bythe doors and the frames therefor of said compartments, an electrical circuit associated with the locks, contacts and plates therefor, remote control for said circuit, means to manually operate said locks of an individual door when saidrcircuit is energized, and further means to deenergize said circuit until said given door is closed and relocked.

2. An electrical safety system including a series of compartments, individual doors for each of said compartments, key operated locks for said doors, contacts and contact plates associated with the doors and frames thereof, an electricalv circuit associated* with the locks, contacts and plates therefor, remote control for said circuit, means to'manually operate said key operated locks of an individual door when said circuit is energized, and further means to deenergize said circuit until said given door is closed and relocked. l

IRVIN E. BUTLER.

that the hereinbefore de-V attempt to reestablish a circuit by 

